Centrifugal machine



July'lo, 1934. LDJQNES K y 1,965,840`

` 'CENTRIFUGAL MACHINE 'July 10, 1934. L. D. JONES CENTRIFUGAL MACHINEFiled Nov. 17. 1932 11 Sheets-Sheet 2 INVENTOR LEO D. JONES.

ATTORNEY July 1o,y 1934. i

L. D. JONES 1,965,840

CENTRIFUGAL MACHINE L. D. JONES CENTRIFUGAL MACHINE July-1o, 1934.l

N ma lNvz-:NToR ,LILO DJoNns ATTORN EY July 10, 1934. D, JONESA1,965,840

CENTRIFUGAL MACHINE Filed Nov. 17, 1932 11 Sheets-Sheet 6 INVENTOR LEO DJ ONE;

BY ma' Q @LUM-:b

ATTORNEY July 10, 1934. L. D. JONES 1,965,840

CENTRIFUGAL MACHINE Filed Nov. 17,v 1952 11 sheets-sheet 7 INVENTOR LEOD. JONES. WM Q. CwM-J,

`ATTORNEY July 10, 1934. L. D. JoNEs CENTRIFUGAL MACHINE Filed Nov.17.1952 11 Sheets-Sheet 8 160C |NVENT0R 160 Y Y BY LEO Dlorms.

awfcnz ,6L/ap@ ATTORNEY July 10, 1934. l.. D. JONES 1,965,840

CENTRIFUGAL MACHINE Filed Nov. 17, 1932 11 sheets-sheet 9 /91 69a ZImvENToR *.91 LBO D. J omas.

MQW

ATTORNEY CENTRIFUGAL MACHINE Filed NOV. 17. 1932 11 Sheets-Sheet 104INVENTOR v LEO D. JONES M @M1 ATTORNEY 'July 1o, 1934. L. D. JONES1,965,840`

CENTRIFUGAL MACHINEK Filed NOV. 1'7, 1932 11 Sheets-Sheet ll lNvEN-roR BLBODJONBS.

ATTORNEY Patented July V10,193.4 y f UNITED STATES PATENT OFFICECENTRIFUGAL MACHINE Leo D. Jones, Philadelphia, Pa., assignor to TheSharples Specialty Company, Philadelphia, Pa., a corporation ofPennsylvania Application November 17, 1932, serial No. 643,022 j i 23Claims. (Cl. 21o- 70) This invention relates to centrifugal machinescorne into operation; that-the operating mechaand particularly to.mechanism for dislodging or nism carries the tool back and forth alongthe unloading fromthe rotor thereof solids collected cylindricalinterior surface of the solids lin the therein as a result ofseparatingsolids from rotor and automatically reverses such motion ofliquids centrifugally. the tool before it comes into engagement with 60In the separation of solids from liquids centhe rotor; that the depth 0fCut made by the tOOl trifugally the removal from the rotor of thesolidsiS automatically Controlled and the means vfor from which liquid hasbeen separated, in such a adjusting the tool for successive cuts isprovided manner that the separating operation maybe `.with eieetiveStops that cannot produce Wedeing subject to a minimum interruption is adiilicult 01. binding; that in the vautOrnatic reversal of 65 problemand even though apparatus may `be the mQtiOll 0f the tOOl, the reversalOf the OI'Ce found that issatisfactoryy with some materials, upOn it iSfull and Complete and automatic; that that apparatus will frequently notbe satisfacthe movement of the tool backy and forth across tory withother materials. Efforts have been made the bed of Solids in the rotoris automatically to provide apparatus capable of removingsolidscontrolled; and that the automatic mechanism 70 continuously `fromcentrifugal rotors but such can be so controlled as tobring the tool torest apparatus is subject to similar defects. f in a desired position atthe end of each dislodg- It has been proposed to provide a dislodginglng Operation. u or cutting tool :for removing solids from centrifAnether feature 0f this invention is that .means ugal rotors during therotation thereof, butv deare Provided fer eutomatieally'producing thef01 75 vices that have been proposed require extensive lowing cycle ofoperation of the centrifugal: and careful control by the operator andthey Liquid miXture iS supplied to the centrifugal are likely to injurethe rotor vwithout effecting the through a. predetermined period and isthen shut desired removal of solids therefrom. It has been 01T; thedepOSit in the IOtOI iS Centrifugally dried proposed to employ a.dislodgingor cutting tool foi e Second predetermined periOd; Wash Wateris 80 that is provided with belt driven operating and Supplied t0 vtheCentrifugal through a third prereversing mechanism, but such devicesrequire determined peiiOd and iS then Shut 01T; the deoonsiderable skinand attention on .the part of posit is again eentrifugauy dried througha fourth the operator. Thus, the inertia of the moving predeterminedperiod; the dislodging tool is parts frequently carries vthe tool pastthe points Started and Causedv t0 operate to remove vthe 85 at which itshould come to rest andleads to injury deposit from the 1`0t01 end itSOperation iS thereor destruction of the rotor vor the tool as afresultafter Stopped and liquid mixture iS again Supof unintended andunavoidable contactof these plied t0 `the Centrifugal t0 begin anotherCycle. members with each other. vThis is particularly ,A further featureiS that means are provided likely to ooour in eases in which the tool iserrof for automatically terminating the supply of liquid 9 `neouslybelieved to be acting upon the bowlcake. miiitlli'e and Starting theOperation 0f the dis- In other cases, when acting upon cake, the toollodging tOOl Should uneVenneSS develop in the movement is notcarried farenough and relayer of solids in the separator duringthe period moval ofcake is incomplete. Attemptsto. limit 0f Supplyv of liquid mixturethereby causing vi- 40 tool movementin suchdevices by stops may causebratien 0f the Centrifugal.

either binding or shocks diilicult to absorb. `Other objects, novelfeatures and advantages A featureof ythis invention is that a toolisfem' 0f this invention will bevappare'nt from the 'folployed whicheffects dislodgment of the solids lowing .specification and accompanyingdrawcollected in a centrifugal rotor quickly vwithout ings, wherein: i y

materially reducing the .speed of rotation of the Fig. 1 is a view,partlyinv section, of, a, een- 100 rotor or stopping it, and the tool is`providedwith trifugal machinev embodying the.. invention; operatingmechanism whereby it is operated au Fig. 2 is .a plan view of the tooloperating tomatically to eifect the desired removal of solids mechanismshown in Fig. 1; l from the rotor without danger of injury to the ro-Fig. 3 is an enlargedl fragmentary view similar tor. Thusfeatures ofthis invention are that to Fig. 1; y

the means for moving the tool is free of inertia Fig. 4 is a section onthe line 4 4 of Fig, 2; that willy tend to carry the tool intoengagement Fig. 5`is a partial section on the line 5-5 of with therotor; that the tool is prevented from Fig. 2; I y

movinginto engagement with the rotor by stops Fig. 6 is a partialsection on the line 6-6 of that d not cause binding or wedging when theyFig. 4; i

Fig. y'1.is a partial section on theline 7-7 of l Fig. 8 is an enlarged*section` on the line 8-8 rig. 9 is .en eniaifgeqlse-etien on the une9-9 4 Vof Fig. 3;

Vals

Fig. 10 is an enlarged section on the line 10-10 Fig; 11 is a sectionvon the line 11--11 of Fig. 10; Fig. 12 is a section on the line 12-12of Fig. 2; Fig. 13 is a section on the line 13--13 of Fig. 12; Fig. 14is a section on the line 14-14 of Fig. l2; Figs. 15, 16 and 17 areperspective views of individual parts:

Fig. 18 is a piping diagram;v

Fig. 19 is a combined piping and wiring diagram;

Figs. 20, 21, 22, 23, 24 and 25 are diagrammatic views of successivesteps in the -cycle of operation of the machine;

Fig. 26 is a combined piping and wiring diagram of a modified form ofthe invention; and

Fig. 27 is a diagrammatic section of a control member.

While apparatus embodying my invention is subject to variousmodifications the. following detailed description of the embodiment.shown in the drawings will assist in an understanding of the inventionand additional features will appear therefrom.

A centrifugal rotor 10, comprising a wall 11, which may be ofcylindrical or other suitable form and which may be perforated orlmperfo-A rate, an end wall 12 provided with an opening 13 and an endwall 14, is mounted upon shaft 15 carried in bearings 16 and 17 whichare supported by a housing 18 which encloses the rotor. The shaft, andthe attached rotor may be rotated in any suitable manner as by a pulley19. In case the rotor is perforated, liquid separated centrifugally fromthe solids is collected in the housing 18 and withdrawn therefromthrough outlet 20. The mixture which is to be separated is supplied inany suitable manner to the rotor 10 as by means of pipe 2l havingdischarge holes 22. After a cake of solids of suitable radial depth isformed in the rotor by straining or by sedimentation or by both suchoperations, and aftersupplyv solids.

The means for supporting and moving the dislodging or cutting tool 25may be mounted in any manner, in proper relation to rotor 11, as bybolting the flange or base plate 26 thereof in position over the opening2'? in the housing 18. Tool 25 is attached to and supported by thetool-operating bar or member 28 and this member is mounted forreciprocation and rotation in bearings 29 and 30 carried by a frame 31which is connected to the flange or base plate 26. Bearing 30 isprovided at the end thereof adjacent the rotor with a stuiling box thatprevents entrance into the bearing of foreign materials such as liquidsand solids introduced into rotor 11, said stuffing box comprisingpacking 311 that is compressed by compression member 32 upon tighteningof bolts 33. Between bearings 29 and 30 the frame 31 is draulic spacedfrom bar 28 to provide a space 34 around bar 28. It is also providedwith openings 34a communicating with this space, through which foreignmaterial entering bearing 30 is discharged, in order that it may notenter bearing 29. In the construction shown, frame 31 is provided with athird bearing 35 for bar 28.

In the construction shown in the drawings the cutting edge of tool 25 ismoved from and toward the inner surface of rotor 11 by rotation of bar28. During the formation of a cake of solids in the rotor, tool 25 ismaintained, by suitable rotation of bar 28, in a position in which itwill not engage the surface of the cake. After a cake of suicient depthhas been 'formed bar 28 is rotated, to carry the cutting edge of thetool toward the inner surface of rotor 11. For this purpose bar 28 isprovided with a keyway 37 in which a key 38 is fitted, this key beingconnected to worm-wheel 39 housed in frame 31 between bearings 29 and35. Shaft 41 is mounted in frame 31 for rotation and carries a worm 40engaging worm-wheel 39. Shaft 41- is also provided with gear 42 which isengaged by gear 43 mounted on shaft 44 to which is secured gear 45 whichin turn engages rack 46. Rack 46 slides within auxiliary housing 310 androd 50 is secured to rack 46. The rod 50 passes through one end ofauxiliary housing 310 and carries on its end a. piston 51 that islocated within hydraulic cylinder 52.

The cylinder 52 is supported by the plate 78,

later to be described, and is provided with heads 52a having portsthrough which liquid is supplied to and discharged from the ends of thecylinder.

consequently the extent of rotation of the bar28 `The extent ofreciprocation of the yrack 46 and is limited by adjustable steps 4'1 and4s carried. 'Y

respectively by the auxiliaryv casing 310 and one- 46 and the piston 51.Liquid kunder pressure is supplied to the cy1inder52by means later to bedescribed for causing reciprocation of the piston,y i 51 'to `effectrotation of the bar28 through the l gears previously-described.;

For-the purpose of carrying cutting a directionparallelto the axisfoftherotor, hy-

t eans isprovided. In the construction shown -t 's means compriseshydraulic cylinders 59 and 60 within which are located-"pistons v61provided with .piston rods 62 f'vwhich extend..

throughstumng boxes 63; 'in-,the construction shown, cylinders 59 and.60 are respectively provided with heads 64 that abut against angeo'rplate 26 of frame 31 'and'heads653thatcarry-.v

stuffing boxes 63. Heads tiiare'jp'rovided withv ears 66 which areattached'.l;iy'*.1nea.r|sfofboltsA 67 to portions of frame 31,vTogassistin holding cylinders 59 and -60 in positionfand to hold'theheads on the cylinder walls.: long., bolts .68..pass

through cylinderY heads 65 and through-cylinder heads 64 and arethreadedvintoilange orabase* piate 26.- f, y

Tool-operating bar 428 is formed: with a-por.-

tion 69 that is of reduced diameter and "a bushing '10 fits thereon andIrests againstV the' v resulting shoulder and is'prevented'vfromfrotatingn bar 2s by pin '11. Yoke .'12 is1pr ovided with angebeningwithin which bushing 'lorotateaiand nut '73 acts tol hold yoke72 injplace on bushi'ng'f'-70.v A plate 74 lies between nut'73`andjyokef72and has a tongue extending into. 's1ot- '15in bar 28 so thatrotation of bar 28 will' not 'causeiuns'crew- `1:60125 v back and.-forth across the cakejin rotor'` 11 in r ing of nut 73. The outer endsof piston rods 62 are secured in yoke 72 as shown in Fig. 2 and lmotionof pistons 61 is thereby imparted to 'rod 28 to {eiect movement of thetool across the face of the cake in rotor 11. Plate 76, which istriangular in the construction shown is held in fixedA position withrespect to frame 31 by being bolted to the three rods 77 that arethreaded vinto'irame and their inner ends engage the end of castingr31to limit the movement of bar 28 into the rotor (to the right in Fig. 4).These bolts are threaded into yoke 72 in order that their positionthereon may be adjusted, and are held in adjusted position with respectto bar 28 by lock nuts 80. Stop bolts 81 are carried by yoke 72 andtheir outer ends engage plate .76 to limit the outward byadmittingliquid under pressure alternatelyr to opposite ends of cylinders 59 and60, ltool 25 will be moved back and forth across the cake in rotor 11andthatthe engagement of lstops 79 v,with casting 31 will adiustablylimitthe extent of such movement in onevdirection whilelengagementofstops 81 with plate 76 will adjustably limit. that'movementin the other direction, .'and

that bar 28 may berotated to adjust the dis- 'v tance 'of the cutting'ledge .of the tool from the inner surface of the rotor without. impartingrotation to any partv of..the' :hydraulic toolrecip' `rocatingmechanism. Wormwheel 39, .which rotates bar 28,l is "sojlocatedintermediate the ends of bar 28 th'at'keywy37'fneyer passeswithin or through packing. 3112 or'into ia position in which materialtreated the rotorvmight lodge ing to the particldrstep in the cycle.And, such mechanism effects acompleteand rapid change,` the supply toany end of the cylinders being. suddenly and completely discontinued andmo-` tion promptly halted.

The `circulating system forthe operating liquid is shown .in Fig.^18. Asupply of liquid,prefer ably oil, maintained in tank 83, and pump 84driven Vby motor 85 delivers the liquid under pressure' into supply pipe86 which delivers the liquidv under pressure to' four-way-valve 88.

From four-way-valve 88, pipes 89 communicate.

a solenoid 201.

a valve head 92d which is maintained on its seat by spring 92h. Thevalve head 92a is provided with a stem 92c which projects beyondthecasing and is provided with an adjustable thimble 92d.y The valve issupported by ,the plate -76 and theV thimble j 92d l is, arrangedsito,beengaged bythe yoke 72. A" pipe 93 leadsfrom the valve :92 to a valve94 having three outlets from which lead. pipes 93a. 93h and 93o. Thevalve 94 is supported-by ythe plate 76 and 'comprises a casing having acentral cylindricaluchamber 94a, in

,which is provided a. reciprocating piston 94h (Fig. 8). A Aconduit 94econnects the ends of thev oyl'nders with the Vdischarge port 94econnected with piper93a. The -pipe 93 communicates with theinlet port94jr which in turn communicates with the central portion of the cylinder94a.. The outlet ports 94g and 94h communicate with pipes 93h and 93eand also communi-4 cate with the chamber 94a. The piston 94h is recessedcentrally 'so that in one position it pro vides communication betweenthe inlet port and one outlet port and in another position providescommunication between the inlet port and the other outlet port. Wheneither outlet port is in' communication with the inlet port, the otheroutlet port is in communication with the conduit 94o. u A rod 53 isconnected at one end to the piston 94h and at the other end to thearmature of A second rod 54 is connected at the other end to this pistonand extends parallel to the bar 28 and has its other end supported byframe 31. A collar 55 isadjustably mounted on the rod 54 and is adaptedto` be engaged by a lug 119a later to be described and carried byauxiliary casing 310. 'The valve 58 comprises ar i 1`lcasing havinginlet and outlet chambers connectvjedfby aport formedv with a seat foravalve-headA '58a which is maintained on .its seat by spring "58h, 'I'hevalve head 58ak is provided with a stem 258e which projects beyond thecasing. A pipe;

93e leads from the valve 58 to the discharge pipek ablel-member95 ofvalve 88 is in the position shown in Fig. 5,.liquid under pressure willpass from pipev 86 through passage 96 into pipes 89 and vto the righthand ends of cylinders 59 and 60 and liquidwill escape from the leftvhand ends of those cylinders through pipes and through passage 97 ofvmovable member 95 into return pipe 9,1. i Shifting of "movable membercountere internal construction of valve 88 appears `v in Fig. 5.Provided valve 92 is. closed when movf j clockwise until passage 96leads from pipes 89 i to returnpipe 91 and passage 97 `leads from supplypipe 86 to pipes 90 willcause liquid under pressureA to be supplied'tothe left-'handends of those-.oylinders and permit liquid to bedischargedfrom the right-hand end of those cylinders into return pipe91. ishereinafter` described for effecting movement oi' movable member 95 backand forth from one of the adjustments above described to the other.

Th automatic reversing mechanism comprises rod 96', (Fig. 4) one end ofwhich is supported 'no 'l Automatic mechanismv 145 for sliding in aframe 77a supported by two of 15@ frame 31.

the rods 7'T and the other end of which is supported by a pivot onrocker arm 97 which is pivoted to bracket 98 carried by frame 31.Contact collars 99 are threaded upon rod 96in order that their positionthereon may be adjusted. Pivoted to the opposite end of rocker arm 97 islink 102 that is pivotally connected to one end of valve-operating bar103` supported for sliding in auxiliary frame 104 that is mounted uponMovable member 95 of four-wayvalve 88 is attached to shaft 105 to whichis secured arm 106 carrying roller 107. Rod 103 is provided with arms108 and 109 for cooperating with roller 107 to swing arm 106 and rotatemovable member 95 of valve 88. Rod 103 is provided with a projection 110which cooperates with a projection 11l on lever 112 that is pivoted at113 and pressed upwardly by spring 114. These parts are shown in Figs. land 4 in the position in which they lie when tool is at rest and valve88 is in the setting shown in Fig. 5. Arm 106 is provided with anextension 116 that engages cushioning stops at the limiting positlons ofarm 106. These stops may be of any 25\ suitable construction but areshown in the draw- \ings simply as lugs 117 in which are adjustablythreaded the screws 118 that engage extension 116.

The ring 74 (Fig. 12) is provided with a'plurality of similar lugs 119and is al'so provided with a lug 119a. The lugs 119 are adapted toengage a lug 120 extending downwardly from an arm 121 which is pivotedatone end by a pin 122 to a member 123 which in turn is attached to a bar124 by bolts 125. A spring 126 contained within a housing 127 on themember 123 tends to maintain ythe i arm 121 in the position shown inFig. 13 with the lug 120 in the path of lugs 119. The bar v124 isslidably supported by frame 77a. and is attached at'one end to one armof a bell crank lever 129 also supported by the frame. The other end ofthe bell crank lever 129 is forked and surrounds the bar 96'. Theleft-hand collar 99 on the bar 96 is arranged to be engaged by theforked arm of the bell crank lever and an additional collar 130 andspring 131 are provided to take up slack motion. f

Clockwise rotation of the bar 28 and ring74 from the position shown inFig. 12 causes the first lug 119 to pull the arm 121 to the right,thereby sliding bar 124 to the right to turn bell crank lever 129 andmove the rod 96 to the left from the position shown in Fig. v4. Suchmovement of the bar 96 causes barY 103 to move to the right until theapex of projection 110 snaps over the apex off* projection 111 and thena quick and complete movement of the rod 103 to the right 1 occurs asprojection 110 rides down the right hand slope of projection 111 due tothe action of the spring 114 and the engagement of the arm 108 withroller 107 causes valve member 95 to be given a quick and completecounter-clockwise movement from the position shown in Fig. 5, to put thesupply pipe 86 into communication with the pipe 89. Thereupon oil iscaused to flow intovr the position shown in Fig. 4, thereby returningthe fvaive sa to the position shown in Fig. 5. Thereupon, the valve 92being closed and the valve 94 properly set, oil will be suppliedto theright hand end of the cylinder 60 and the bar -to cause the next lug 119to again actuate the valve reversing'mechanism and the'above describedcycle is repeated. Rotation of the bar 28 is effected by movement of therack 46 through the medium of gears 41, 42, 43 and 45, the rack 46 beingactuated by the piston 51 which in turn is actuated by oil supplied tothe cylinder 52, the supply 'of oil being controlled by the valve 92which is opened by the bar 28 when returned to the position shown inFig. 4. The bar 28 is thus caused to reciprocate and prior to eachstroke the bar is rotated slightly to advance the cutting edge of thetool 25 toward the rotor. Continued rotation of the bar 28 brings thelug 119a. into alignment with the stop collar 55 mounted on theconnecting rod 54. Engagement of the lug 1190, with the collar 55operates the valve 94 and causes reverse rotation of the bar, when ithas returned to` position shown in Fig. 4, to move the cutting edge ofthe tool 25 away from the rotor. The lug 120 is provided with a cam face120a which is engaged by the lugs 119 upon counterclockwise rotation ofthe bar 28. When the lugs engage the face 120e the arm 121 swingsoutwardly to 4permit the lugs to pass.

to the shaft 135 and at its outer end is connected to the end of aplunger 137 around which is arranged a spring 137a for movingplungertothe right.I The other end of the plunger lis engaged by an adjustablepush rod 138a connected to a lever 138 pivotally supported by a bracketattached to the valve 58. A bolt 139 is threaded through the lever 138and is adapted to engage the end of stem 58e of the valve 58. A lock nut140 is provided to hold the bolt/139 in adjusted position. A rod 141 isslidably mounted in the stop bolt 47 and projects into the casing 310into position to be engaged by the end of rack 46. 'Ihe rod 141 projectsthrough an eye 142 in the lever 138 and is provided with a collar 143threaded thereon. The collar 143 is adjustable on the rod 141 and a locknut 144 is provided for holding the rod 141 to the right causes thelever 138 to swing, thereby opening the valve 58 and rotating themercoid switch from the position shown in Fig. 11 in which the switch isopen to a position in which the switch is closed.

A supply pipe 150 for the mixture to be separated and a water supplypipe 151 communicate with the pipe 21. 'I'he pipe 150 is controlled by avalve 152 and the pipe 151 is controlled by a valve 153. The valve 152is provided with a quadrant 154 which meshes with a pinion 155 mountedon the shaftof a torque motor 156. 'I'he valve 153 is provided with anarm 157 which is connected by suitable linkage with the armature of asolenoid 159. `A spring 158 tends to hold the valve in closed position.Y 1

The torque motor 156 is connected with a three phase power line througha switch 160. The wire 161 leads directly from the motor to one terminal160a of the switch 160. The wires 162 and 163 lead fromthe motor tocontacts164 and 165 at the end of an insulated bar 166 supported by thearmature 167 of a solenoid 68. The contacts 164 and are adapted toengagerespectively either l150 rack 46 to the left also actuates gears 45, 43,42 and 41 to rotate the bar 28 to bring the tool 25 into cuttingposition. Rotation of the bar 28 causes the first lug 119 to move thebar 124 thereby actuating the bell crank lever 129 to pull the rod 96 tothe left and actuate valve 88 to turn the same into position in whichthe pipe 86 is connected to the pipe 90 and shutting off iiow tocylinder 52 to stopr rotation of bar 28.

Oil thereupon flows into the left hand end of the cylinder 60 and causesthe piston 61 to move to the right; thereby moving the bar 28 into therotor. The oil from cylinder 60 discharges through pipe 89 and valve 88,into pipe 91. As the bar 28 moves inwardly the plate 78 moves out ofengagement with the thimble 93e, thereby permitting valve 92 to close(Fig. 23), to prevent flow to cylinder 52. As the bar 28 reaches thelimit of its stroke the lug 101 engages the right hand collar 99 to movethe rod 96' to the right, thereby tripping the actuating mechanism ofvalve 88 and returning the same to the position in which the pipe 86communicates with a pipe 89 (Fig. 23). As the valve 92 is now closed oilpasses through the pipe 89 into the right hand end of the cylinder 60and moves the piston 61 to the left. Oil is discharged fromthe left handend of the cylinder 60 through the pipe 90 and valve 86 into thedischarge pipe 91. When the bar 88 approaches the left hand end of itsstroke the plate 78 again engages the stem of valve 92,

thereby opening the same and permitting oil to ow through the valve 92,pipe 93, valve 94, pipe 93b and into the right hand end of cylinder 50,thereby moving the piston 51 further to the left. Movement of the pistoncauses further rotation of the bar 28 and the engagement of the secondlug 119 With the lug 120 to slide the bar 128 thereby again actuatingbell crank lever 129 and rod 96 to reverse the position of valve 88 andrepeat the cycle just outlined. The third actuation of the piston 51brings it to the limit of its movement and the third rotational step ofthe bar 28 brings the lug 119a into position to engage the collar 55 onrod 54 on its next movement to the right (Fig. 25). Engagement of thelug 119a with the collar 55 returns the p iston to the position shown inFig. 25. On the next return of the bar 28 to its left hand position thevalve 92 is again opened and oil will now iiow'through this valve, pipe93, valve 94 and into the left hand end of cylinder 50, thereby forcingthe piston 51 to the right. The rack 46 moves to the right with thepistonl and causes reverse rotation of the bar to its original position,opens valve 58 and actuates mercoid switch 132 to close the same.YActuation of the mercoid switch 132 closes the circuits through thesolenoid 168 and the relay 177, thereby energizing the torque motor 156to again open the valve 152 from which point the cycle above described'will be repeated.

The operation of the machine thus involvesr the initial opening of thevalve 152 by the energization of the motor 156 through the contacts 164,165 to admit the feed of liquid mixture to the bowl through the openings22 in the feed pipe 21. After this feed has continued for a. suitableperiod, the armature of the relay 177 will be actuated and the valve152wi1l be moved to closed position. A drying period now ensues duringthe continued rotation of the rotor and at the end of such drying periodthe slow-acting relay 182 eiects a movement of its armature and anopening of the valve 153 to admit wash water to the cylinder. The feedof water through this valve is maintained until the armature ofslow-acting relay 192 has disengaged the bridge 191 from contacts 187 topermit the return of valve 153 to closed position. The washed cake isthen dried during the lag incident to the operation of slow-acting relay197. The operation of relay 197 energizes the solenoid 201 to move thepiston 94h, 94a into the left hand position, in which communication isestablished between pipe 93 and the right hand end of cylinder 52 tomove piston 51 to the left as indicated in full lines in Figure 22.

Movement of the piston 51 in this manner causes a partial rotation ofthe tool 25. Such movement also permits closure of the valvel 58 andactuates switch 132 to open the circuit including relay. 177 to permitsuccessive de-ener- Vgizing of solenoids 182, 192, 197 and 201 andopening of circuits controlled thereby. Rotation of bar 28 also operatesthrough the first lug 119, bar 124 and bell-crank 129 to turn the valve88 into a position in which fluid is admitted to the left hand end ofcylinder 60, as illustrated in Fig. 23. As the bar 28 moves inwardly,the plate 78 allows valve 92 to close, thereby precluding further flowof motive fluid to the right hand end of cylinder 52 and limiting thestroke of piston 51 to the full line position of Fig. 22.

At the end of the inward stroke of the tool the lug 101, (Fig. 4), tripsthe actuating mechanism of the valve 88 to reverse its position andeffect a return stroke of the bar 28. As this bar returns it again opensthe valve 92 by reason of the abutment of plate 78 thereagainst,allowing fluid to be again admitted to the right hand end of, cylinder52. Further rotation of bar 2 8 incident to such movement operatesthrough the second lug 19 to again reverse the valve 88 and a secondforward stroke of the tool ensues. A third stroke is also initiated asabove described. The third movement of bar 28 to the right causesabutment of lug 119a with collar 55, thereby reversing the position ofthe valve 94 and allowing oil to-be admitted to the left hand end ofcylinder 50 Yto move the piston 51 to the right to return the tool 25 toits originalangular position, upon the completion of its reciprocatingstroke to the left and the consequent opening of the valve 92. Theswitch 132 is also moved to closed position by means of the rack 46which is moved to the right by such movement, and the cycle is thereuponrepeated.

In Fig. 26 a modied form of the control mechanism is disclosed. In lthismodification the valve 152 is actuated hydraulically instead ofelectrically. Theoutlet from valve 58 is connected by pipe 93k with oneend of a cylinder 225 in which is mounted a spring pressed piston 226which is connected by a link 227 with the actuating arm 228 of the valve152. The pipe 93k communicates through a valve 229 with the dischargepipe 91. The valve 229 has an operating handle 230 which is connectedto. the armature lof solenoid 168.

Upon closure of the switch 161a, a circuitis closed f the contacts 169and 171 or the contacts 170 and 172. Contacts 169 and 172 are connectedthrough wire 173 with the terminal 1601i of the switch 160 and contacts170 and 171 are connected by wire 174 with the terminal 160e of theswitch. One terminal of the mercoid switch 132 is connected through thewire 175 with the wire 173 and-its other terminal is connected throughthe wire 176 with the armature and winding of a slow acting relay 177which is connected through wires 178, 179 and 180 with wire 174. Theinner contact for the armature of relay 177 is connected by wire -181through the field winding of relay 182 with wire 174. The outer contactof relay 177 is connected by wire 183 through the field winding ofsolenoid 167 with wire 179. Terminal of switch 160b is connected by wire185 with the contacts of relay 182. The armature of relay 182 isconnected by wire 186 with a contact 187. A contact 188 is connected bywire 189 with the eld winding of the solenoid 159 which in turn isconnected by wire 190 with wire 180. The contacts 187 and 188 arebridged by a conductor 191 carried by the armature of a solenoid 192,the field winding of which is connected to the wire 186 and also to thewire 174. A contact 193 is connected by a wire 194 with the wire 185 anda contact 195 is connected by wire 196 with the armature and fieldwinding of a relay 197, the field winding being connected by a` wire 198with the wire 174. A conductor 199 carried by the armature of thesolenoid 192 is adapted to bridge the contacts 193 and 195. AThe contactof relay 197 is connected by wire 200 with the eld winding of solenoid201 which in turn is connected by wire 202 with wire 174. kA manuallyoperable switch 203 is provided between wire 185 and wire 200. Thearmature of a relay 204 is connected to the wire 185 and the contact forthis relay is connected to the wire 200. The field winding of the relay204 is connected through relays not shown with the photoelectric cell205 shown in Fig. 27.

Figs. 1 to 17 show the above described apparatus at rest, the bar 28being arranged in the position shown in Fig. 4, the valve 88 being inthe position shown in Fig. 5, the valves 150 and 151 being closed, theswitch 160 being open and the various switches, relays of the electriccircuit and the valves of the oil circuit being in the positions shownin Fig. 19.

With the rotor of the separator operatinglat proper speed the switch 160is closed to start the cycle of operations of the device. The movablecontacts 164 and 165 being in engagement with the stationary contactsy170 and 172, current is supplied to the torque motor in such way as totend to move the valve '152 into closed position but as the valve isalready closed there is no change in the position thereof. Currentpasses through the mercoid switch 132, the armature and outer contact ofrelay 177, and field winding of solenoid 167. Energization of thesolenoid causes actuation of its armature to lift contacts 164 and 165away from contacts 170 and 172 and bring contacts 164 and 165 intoengagement with contacts 169 and 171. Thereupon, the motor 156 isoppositely energized and turns the valve 150 into open position, therebypermitting iiow of liquid mixture through the pipe 21 into the rotor ofthe separator. Simultaneously with the closing of the circuit justdescribed a second circuit is closed through the field winding of relay177. The relay 177 is slow acting and is so timed that after apredetermined period it moves its armature out of engagement with theouter contact and into engagement with the inner contact, thus openingthe circuit through the field winding of solenoid 167 and closinganother circuit 'through eld winding of solenoid 182. The solenoid 167is thereby de-energized and its armature drops down to return thecontacts 164 and 165 into engagement with contacts 170 and 172,thereupon the motor 156 is reversed to close the valve 152. The relay182 is slow acting and is so timed that it does not actuate its armaturefor a predetermined period, during which period the cake deposited onthe interior of the rotor is dried. Engagement of the armature of relay182 with its contact closes a circuit through contact 187, bridge 191,contact 188 and field winding of solenoid 159. The solenoid 159 istherebyv energized and its armature is pulled against the action of thespring 158 to open valve 153, thereby supplying wash water through thepipe 2 1 to the rotor. Also a circuit is simultaneously closed throughthe field winding of solenoid 192. The solenoid 192 is slow acting andis properly timed to operate after a predetermined period, during whichthe wash wateris supplied to the rotor. Lifting of the armature of relay192 disengages the bridge 191 from the contacts 187 and 188 therebyopening the circuit through the solenoid 159 to de-energize the same andpermit the spring 158 to return the valve 153 tol closed position. Atthe same time, the bridge 199 is brought into engagement with thecontacts 193 and 195 thereby closing a circuit through the field windingof relay 197. The relay 197 is slow acting and is timed to operate onlyafter a predetermined period during which the washed cake in the rotoris again dried. Lifting of the armature of the relay 197 closes acircuit through the field Winding of solenoid 201. Energization of thesolenoid 201 causes the same to move its armature to the left, therebyactuating the piston 94h of the valve 94.

Before actuation of the piston 94h, the valve 94 was so set that oil wasowing from pipe 86 through valve 88, pipe 89a, valve 92, pipe 93, valve94, pipe 93o, valve 58 and pipe 93e to pipe 91, the valve 92 being heldopen by engagement 120 of the plate 78 with the thimble 92d and thevalve 58 being held open by engagement of the rack 46 with the stem 58e(Fig. 20). Energization of the solenoid 201 moves the piston 94h intothe position shown in Fig. 21, thus closing 125 off pipes 93e from pipe93 and putting pipe 93h into communication with pipe 93. Oil thereuponflows into the right hand end of cylinder 52 and moves piston 51 to theleft, (Fig. 22), the oil already in the cylinder being discharged,through 130 pipe 93e, valve 94 and pipe 93a into pipe 91. Movement ofthe piston 51 to the left draws the rack 46 to the left, therebypermitting valve 58 to close and actuating the mercoid switch 132 toopen the circuit of which it is a part, thereby 1.35 de-energizing relay177 and permitting its armature to move from engagement with the innercontact into engagement with the outer contact, thereby opening thecircuit through solenoid 182. De-energization of solenoid 182 permitsits armature to become disengaged from its contact, thereby opening thecircuit through solenoid 192. De-energization of solenoid 192 permitsits armature to drop to disengage the bridge 199 from the contacts 193and 195, thereby opening the circuit through solenoid 197.Deenergization of solenoid 197 permits its armature to move outofengagement `with its contact. thereby opening the circuit throughsolenoid 201 and de-energizing the same. Movement of the 150 operationis identical with the control system previously described.

In Fig. 27 there is disclosed an automatic control for setting inoperation the discharging mechanism should the rotor become unbalanceddue to an uneven layer of deposit. A plate 236 is linked to the frame ofthe centrifugal `and leads into a housing 237. The housing is mounted onan independent foundation. In one end of the housing there is provided asource of light 238 and in the other end of the housing there is pro--vided a photo-electric cell 239. Between the source 238 and thephoto-electric cell 239 there is provided a partition 240 having anaperture. The

plate 236 also has an aperture, the arrangement of these apertures beingsuch that normally they are out of register. However, should thecentrifugal begin to vibrate due to an unbalanced condition, the plate236 will be moved suflicently to bring its aperture into register withthe aperture in the partition 240 therebypermitting light to pass fromthe source 238 to the photo-electric cell 239. The photo-electric cell239 is connected to a relay 241 which in turn is connected to the iieldwindng of solenoid 204. When light falls on the photo-electric cell 239the solenoid 204 is energized, thereby causing its armature to be movedinto engagement with its cont-act and closing the circuit throughsolenoid 201 to set the discharge mechanism in operation.

The switch 203 may be manually operated at any time to set in operationthe discharging mechanism. Actuation of this switch closes the circuitthrough the solenoid201 to effect actuation of the control member 94h ofthe Valve 94.

Modifications may be obvious to those skilled in the art and I do nottherefore Wish to be limited except by the scope of my sub-joined claimsas interpreted in the light of the generic spirit of my invention.

What I claim is:

1. In combination, a rotor, a tool holder mounted for rotation andreciprocation axially of said rotor, means for effecting reciprocationand rotation of said holder, means controlled by linear and rotarymovement of said holder for determining the direction of linearmovement, and means actuated bylinear movement of said holder forcontrolling the rotation thereof.

2. In combination, a rotor, a tool holder` mounted for rotation andreciprocation axially of said rotor, means for effecting l'near androtary movement of said holder, means actuated by said holder at the endof its inward stroke for reversing its direction of movement. meansactuated by said' holder at the end of its outward stroke for effectingrotation of said holder, and means'actuated by rotation of said holderfor reversing the direction of linear movement of said holder.

3. In combination, a rotor, a tool holder mounted for rotation andreciprocation axially of said rotor, hydraulic means for effectingreciprocation of said holder, a valve for controlling the direction `oflinear movement of said hol-der, means actuated by said holder foreffecting rotation thereof at one end of its stroke, means actuated byrotation of said holder to effect actuation of said valve to causereverse linear movement of said holder and means actuated by said holderat the end of its reverse stroke to reverse said valve.

4. In combination, a rotor, a tool holder mounted for rotation andreciprocation axially of said'rotor, means for effecting linear androtary movement of said holder, means actuated by said holder at one endof its stroke to reverse the direction of linear movement of the holder,means actuated by said holder at the opposite end of its stroke foreffecting rotary movement of said holder, means actuated by rotarymovement of said holder for effecting linear movement ofthe holderI inthe first direction, and means actuated by said holder after apredetermined number of strokes for rendering inoperative said firstnamed means.

5. In combination, a rotor, a tool holder mounted for rotation andreciprocation axially of said rotor, means for effecting linear androtary movement of said holder, means actuated by said holder at one endof its stroke to reverse the direction of linear movement of the holder,means actuated by said holder at the opposite end of its stroke foreffecting rotary movement of said holder, means actuated by rotarymovement of said holder for effecting linear movement of the holder inthe rst direction, and means for periodically supplying to said rotor asupply of mixture to be treated.

6. In combination, a rotor, a tool holder mounted for rotation andreciprocation axially of said rotor, means for effecting linear androtary movement of said holder, means actuated by said holder at one endof its stroke to reverse the direction of linear movement of the holder,means actuated by said holder at the opposite end of its stroke foreffecting rotary movement of said holder, means actuated by rotarymovement of said holder for effecting linear movement of the holder inthe rst direction, means for supplying liquid to be treated to saidrotor periodically and over a predetermined period, and means forsubsequently supplying wash water to said rotor after a predeterminedinterval and for a predetermined period.

7. In combination, a rotor, a tool holder mounted for rotation andreciprocation axially of said rotor, hydraulic means for effectingreciprocation of said holder, a valve for controlling the direction ofmovement of saidholder, means controlled by said holder for rotatingthesame at the outward end of its stroke, means operable by rotation ofsaid holder toactuate said valve 'to cause inward movement of theholder.and

draulic means for rotating said holder, a second y valve for controllingthe direction of rotation of said holder, automatic means for actuatingsaid second valve, means actuatable by said holder for controlling flowthrough said second valve. means operable by rotation of said holder toactuate said first valve to cause inward movement of the holder, meansoperable by inward movement of said holder to actuate said first valveto cause reverse movement of said holder. and means operable by saidholder after predetermined rotation thereof for reversing said secondvalve.

9. In combination, a rotor, a tool holder, hydraulic means for rotatingsaid tool holder and reciprocating the same axially of said rotor, valvemeans for rendering said hydraulic means operative or inoperative, apipe extending into a supply of mixture to be treated, a second valvefor connecting said pipe with a supply of wash water, automatic means-for openingsaid first valve and closing the same after a predeterminedperiod, opening said second valve after a second predetermined periodand closing the same after a third predetermined period and after afourth predetermined period actuating said valve means to render saidhydraulic means operative, and means operable by said holder after apredetermined number of strokes for actuating said valve means to rendersaid hydraulic means inoperative.

10. In combination, a rotor, a tool holder mounted for rotation andreciprocation axially of said rotor, hydraulic means for rotating saidholder, hydraulic means for reciprocating said holder, valve meansoperable by reciprocation of said holder for controlling said rsthydraulic means, and valve means operable by rotation and reciprocationof said holder for controlling said second hydraulic means.

11. In combination, a rotor, a tool holder mounted for rotation. andreciprocation axially of said rotor, hydraulic means for rotating saidholder, hydraulic means for reciprocating said holder, valve means forrendering said hydraulic means operative or inoperative, valve meansoperable by reciprocation of said holder for controlling said firsthydraulic means, valve means operable by rotation and reciprocation ofsaid holder for controlling said second hydraulic means, a pipeextending into said rotor, a valve connecting said pipe with a supply ofmixture to be treated, a second valve connecting said pipe with a supplyof wash water, automatic means for opening the rst valve and closing thesame after a predetermined period, opening the second valve after asecond predetermined period and closing the same after a thirdpredetermined period and after a fourth predetermined period actuatingsaid rst named valve means for rendering said hydraulic means operative.

12. In combination, a rotor, a tool holder mounted for rotation andreciprocation axially of said rotor, hydraulic means for rotating saidholder, .hydraulic means for reciprocating said holder, valve means forrendering said hydraulic means operative or inoperative, valve meansoperable by reciprocation of said holder for controlling said firsthydraulic means, valve means operable by rotation and reciprocation ofsaid holder for controlling said second hydraulic means, a pipeextending into said rotor, a valve connecting said pipe with a supply ofmixture to be treated, a second valve connecting said pipe with a supplyof Wash Water, automatic means for opening the first valve and closingthe same after a predetermined period, opening the second valve after asecond predetermined period and closing. the same after a thirdpredetermined period and after a fourth predetermined period actuatingsaid irst named valve means for rendering said hydraulic meansoperative, and means operable by said holder after a predeterminednumber of strokes for actuating said valve means to render saidhydraulic means operative.

'13. In combination, a rotor, a tool holder mounted for rotation andreciprocation axially of said rotor, hydraulic means for reciprocatingsaid holder, a valve for controlling the direction of movement of saidholder, hydraulic means for rotating said holder, a second valve forcontrolling the direction of rotation of said holder,

means for actuating said second valve, a third valve actuatable by saidholder for controlling flow through said rst and second valves, meansoperable by rotation of said holder to actuate said rst valve to causeinward movement of the holder, means operable by inward movement of saidholder to actuate said first valve to cause outward movement of saidholder, and means operable by said holder after predetermined rotationthereof for reversing said second valve.

14. In combination, a rotor, a tool holder mounted for rotation andreciprocation axially 'of said rotor, hydraulic means for reciprocatingsaid holder, a valve for controlling the direction of movement of saidholder, hydraulic means for rotating said holder, a second valve forcontrolling the direction of rotation of said holder, means foractuating said second valve, a selfclosing valve for controlling flowthrough said rst and second valves, means carried by said holder foropening said last named valve at the end of an outward stroke, meansoperable by rotation of said holder to actuate said first valve to causeinward movement of the holder, means operable by inward movement of saidholder to actuate said rst valve to cause reverse movement of saidholder, and means operable by said holder after predetermined rotationthereof for reversing said second valve.

15. In combination, a rotor, a tool holder mounted for rotation andreciprocation axially of said rotor, hydraulic means for rotating saidholder, hydraulic means for reciprocating said holder, valve meanscontrolled by reciprocation and rotation of said holder for determiningthe direction of reciprocation thereof, valve means for controlling thedirection of rotation of said holder, Arneans controlled by said holderfor rendering said rst hydraulic means operative or inoperative, andvalve means actuatable by said hblder after a predetermined number ofstrokes to render said second hydraulic means operative.

16. In combination, a rotor, a tool holder mounted for rotation andreciprocation axially of said rotor, hydraulic means for rotating saidholder, hydraulic means for reciprocating said holder, valve meanscontrolled by reciprocation and rotation of said holder for determiningthe direction of reciprocation, valve means for controlling thedirection of rotation, valve means controlled by reciprocation of saidholder for rendering both said hydraulic means operative or inoperative,means to actuate said second valve means to produce rotation of saidholder in one direction, and means actuatable by said holder after apredetermined number of strokes for reversing said valve means.

17. In combination, a rotor, a tool holder mounted for rotation andreciprocation axially of said rotor, hydraulic means for rotating saidholder, hydraulic means for reciprocating said holder, valve meanscontrolled by reciprocation and rotation ofvsaid holder for determiningthe direction of reciprocation, valve means for determining thedirection of rotation of said holder, valve means controlled by saidholder for alternately rendering each of said hydraulic means operativeand the other hydraulic means inoperative, vmeans for actuating saidsecond valve means for causing rotation of said holder in one direction,and means actuated by the holder after-a predetermined number of strokesfor reversing said second valve means.

18. In combination, a rotor, a tool holder mounted for rotation andreciprocation axially of said rotor, hydraulic means for rotating saidholder, hydraulic means for reciprocating said holder, a valvecontrolled yby reciprocation and rotation of said holder for determiningthe direction of reciprocation, a second valve for deter'- mining thedirection of rotation of said holder, a third valve controlled by saidholder for pre,- venting flow through either said first or second valve,means for actuating said second valve to cause rotation of said holderin one direction, means actuated by said holder after a predeterminednumber of strokes for reversing said second valve and a fourth valvecontrolled by said first hydraulic means for by-passing the actuatingfluid around both said hydraulic means.

19. In combination, a rotor, a tool holder mounted for rotation andreciprocation axially of said rotor, hydraulic means for rotating saidholder, hydraulic means for reciprocating said holder, a valvecontrolled by reciprocation and rotation of said holder for determiningthe direction of reciprocation, a second valve for determining thedirection of rotation of said holder, a third valve controlled by saidholder for pre- 'venting fiow through either said first or second valve,means actuated by said holder after a predetermined number of strokesfor reversing said second valve, a fourth valve controlled by said firsthydraulic means for by-passing theactuating fiuid around both saidIhydraulic means, a pipe extending into said rotor, a fifth valveconnecting said pipe with a supply ofvmixture to be treated, a sixthvalve connecting said pipe with a supply of wash water, and automaticmeans for opening said fifth valve and closing the same after apredetermined period, opening the sixth valve after a secondpredetermined period and closing the same after a third predeterminederiod and after a fourth predetermined period actuating said secondvalve to causerotation of said holder from a position of rest.

20. In combination, a. rotor, a tool holder mounted for rotation andreciprocation axially of said rotor, hydraulic means for rotating saidholder, hydraulic means for reciprocating said holder, a valve controlled by reciprocation and rotationof said holder for determiningthe diy rection of reciprocation, a second valve for de` termining thedirection of rotation of said holder, athird valve controlled by saidholder for pre venting flow through either said first or second valve,means actuated by said holder after a predetermined number of strokesfor reversing said second valve,v a fourth valve controlled by said ,rsthydraulic means for by-passing the actuating fiuid around both saidhydraulic means, a

21. In combination, a rotor, a tool holder mounted for rotation andreciprocation axially of said rotor, hydraulic means vfor rotating saidholder, hydraulic means for reciprocating said holder, a valvecontrolled by reciprocation and rotation of said holder for 'determiningthe direction of `reciprocation, a second valvev for determining thedirection of rotation of said holder, a third valve controlled by saidholder for preventing fiow through either said first or second valve,means actuated by said holder after a predetermined numberof strokes forreversing said second valve, a fourth` valve, controlled by said firsthydraulic means for by-passing the actuating fluid around both saidhydraulic means, a pipe extending into said rotor, a fifth valveconnecting said pipe with a supply of mixture to be treated, a sixthvalve connecting said pipe with a supply of wash-water,.electrical meansfor opening said fifth valve and closing the same after a predeterminedperiod, opening the sixth valve after a second predetermined period andclosing the same after a third predetermined period and after a. fourthpredetermined period actuating said second valve to cause rotationofsaid holder from a position of rest, and a switch controlled by saidfirst hydraulic means for effecting energization and de-energization ofsaid electrical means.

22. In combination, a rotor, a tool holder mounted for rotation andreciprocation axially of said rotor, hydraulic mans for rotating saidholder, hydraulic means for reciprocating said holder, a yvalvecontrolledl by vreciprocation and rotation of said holder fordetermining the direction of reciprocation, a second valve fordetermining the direction of rotation of said holder, a third valvecontrolled by said holder for preventing flow through either'said firstor second valve, means actuated by said holder after a predeterminednumber of strokes for reversing said second valve, a fourth valvecontrolled by said first hydraulic means for by-passing the actuatinguid around both said hydraulic means, a pipe extending into said rotor,a fifth valve connecting said pipe with'a supply of mixture to betreated, a sixth valve connecting said pipe with a supply of wash-water,electrical means for opening said fifth valve and closing the same aftera predetermined period,vopening the sixth trical means, and meansresponsive to the vibration of said rotor -for energizing the means foractuating said second valve.

23. In combination, a rotor, a tool holder Imounted for rotation andreciprocation axially of said rotor, hydraulic means for rotating said'holder, hydraulic means for reciprocating` said holder, a valve fordetermining the direction of reciprocation, lugs carried by said holder,a slide engageable by said lugs, linkage between saidlmeans 'forreversing said second valve after a 'predetermined number of strokes ofsaid holder.

LEO D. JONES.

